Hanna-instruments HI 84432 Manuel d'utilisateur

1Instruction ManualHI 84432TITRATABLE ACIDITYMINITITRATOR & pH METERfor Fruit Juiceswww.hannainst.com

10PERISTALTIC PUMPPeristaltic pumps are self priming. Liquid never contacts the pump components. The titrant tubingis pressed along the rotating rolle

11TITRATOR STARTUPThis is a general outline of the steps required to make a titration. The following topics areexpanded upon each section that follows

12Use the ARROW keys in order to increase/decrease the value.Press Accept to confirm or ESC to return to thesetup menu without saving the new value.

13Use the ARROW keys or / in order toincrease/decrease the value.Press Accept to confirm the value or ESC toreturn to the setup menu.Option: 0 t

14Press / to highlight the value to bemodified (year, month, day, hour, minute orsecond). Use the ARROW keys to change thevalue.Press Accept to c

15Press the function key to select the new option.When enabled, a short beep is heard every time akey is pressed or when the calibration can beconfirm

16ELECTRODE PREPARATIONPREPARATION PROCEDURERemove the electrode protective cap.DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal wit

17ELECTRODE CALIBRATION PROCEDUREIt is recommended to calibrate the instrument frequently, especially if high accuracy is required.The pH electrode sh

18• The (unstable measurement) symbol will be shown on the display until the readingbecomes stable.• When the reading is stable and close to the selec

19Point 3 calibration• Remove the electrode holder with electrode from the top of the beaker.• Place the third buffer solution in a beaker and place i

2Dear Customer,Thank you for choosing a Hanna product. This manual will provide you with the necessaryinformation for the correct use of the instrumen

20• If the computed slope isn’t within the preset limits the meter will display themessage “Wrong Slope”. If the slope is too high the symbol will b

21Notes: • To clear a previous calibration and to return to the default value, press Clear at anytime after entering calibration mode. The “Calibratio

22The temperature has an effect on pH. The calibration buffer solutions are affected by temperaturechanges to a lesser degree than normal solutions. D

23PUMP TUBE INSTALLATIONTo mount the new peristaltic pump tube follow next steps:• Position one tubing ferrule ring on its location.• Stretch the tube

24PURGEPurging should be performed:• if you notice there is no titrant in the tip;• whenever the tube of the peristaltic pump is replaced;• whenever t

25• Press Purge to begin a purge cycle.The purging stops automatically after 5 minutes.To stop purging at any time and return to the main screen pres

26Please set up the instrument before performing the pump calibration.The calibration of the pump must be performed each time the pump tube, the reage

27• Press Pump.The next screen will be displayed.• Press Start.• After the pump calibration is started, on the upper right side of the display two ani

28Notes: • The calibration of the pump is dependent on concentration unit selected during SETUP.• If an erroneous situation is encountered during the

29Notes: • Check the pH of distilled water. If necessary,adjust the pH to 8.2 by adding 1-2 drops oftitrant solution.• Fruit juices samples must be st

3All rights are reserved. Reproduction in whole or in part is prohibited without the written consentof the copyright owner, Hanna Instruments Inc., Wo

30• Press Start to begin the titration process.• After the titration is started two animations will be shown on the upper right side of thedisplay to

31• If the concentration is out of limits an exceeded range limit message will be displayedblinking and the message “Out of range” will be shown. Anot

32Use the ARROW keys to scroll the stored records list.If the saved concentration was out of range the “!” and “<” / “>” symbol (underrange/over

33GLP contains a set of information regarding electrode calibration. The following items areincluded in electrode GLP: the time and date of the last c

34If GLP pump is pressed, one of the next screens is displayed.The pump GLP displays the Time and Date of the last pump calibration.If a calibration h

35Press HELP to view the contextual help, every time you need supplementary information. Thehelp is customized for every situation that can appear dur

36VIEW/DELETE RECORDED pH DATATo view or delete previously logged pH records press MENU key while in pH meter screen.Press Recall to access the pH rec

37pH METER GLP INFORMATIONThe pH meter GLP screens references the last pH calibration data. GLP is an acronym for GoodLaboratory Practice.To view this

38TEMPERATURE CALIBRATION PROCEDURE (for technical personnel only)All the instruments are factory calibrated for temperature.HANNA’s temperature probe

39• Immerse the temperature probe in the second vessel as near as possible to the referencethermometer. Allow a few seconds for the probe to stabilize

4Please examine this product carefully. Make sure that the instrument is not damaged. If anydamage occurred during shipment, please notify your Dealer

40SMOTPMYSSMOTPMYSSMOTPMYSSMOTPMYSSMOTPMYSMELBORPMELBORPMELBORPMELBORPMELBORPNOITULOSNOITULOSNOITULOSNOITULOSNOITULOSevissecxe/esnopserwolS.tfird.edor

41ELECTRODE CONDITIONING AND MAINTENANCEpH CLEANING PROCEDURE• GeneralSoak in Hanna HI 7061 or HI 8061 General Cleaning Solution forapproximately ½ ho

42REAGENTSHI 84432-50 Titrant solution (100mL)HI 84432-55 Pump calibration solution (100mL)HI 84432-70 Reagents kit (about 150 titrations)pH CALIBRATI

43HI 84432 is warranted for two years against defects in workmanship and materials when used for itsintended purpose and maintained according to the i

44Printed in Romania, EUMAN84432 07/09Hanna Instruments Inc.Highland Industrial Park584 Park East DriveWoonsocket, RI 02895 USALocal Sales and Custom

5The Titratable Acidity determination is instantaneously displayed in selected measurement unitson the large dot matrix display. The instrument is rea

6SPECIFICATIONSTitrator Range Titratable acidity (low range): 15 mL sampleg/100 mL as citric acid: 0.20 - 1.20% CAg/100 mL as tartaric acid: 0.23 - 1.

7PRINCIPLE OF OPERATIONFruit juice acidity is determined by neutralization of all available hydrogen ions present in thesample, with a strong base sol

8OVERHEAD VIEW1. Titrant bottle2. Graphic LCD3. Keypad4. Dedicated guide tubefor Temperature Probe5. Electrode holder6. Dedicated guide tube for titra

9ESC - used to leave the current screen and to return either to the previous screen or to themain screen. When pressed while modifying a parameter wit